One-page reference for Win32 assembly language programming.

Created by Peter Kankowski
Last changed
Filed under Assembly language and machine code

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Win32 Assembly Cheat Sheet

The cheat sheet is intended for 32-bit Windows programming with FASM. One A4 page contains almost all general-purpose x86 instructions (except FPU, MMX and SSE instructions).

What is included

You will find various kinds of moves (MOV, CMOV, XCHG), arithmetical (ADD, SUB, MUL, DIV) and logical (AND, OR, XOR, NOT) instructions here. Several charts illustrate shifts (SHL/SHR, ROL/ROR, RCL/RCR) and stack frames. Code samples for typical high-level language constructs (if conditions, while and for loops, switches, function calls) are shown. Also included are quick references for RDTSC and CPUID instructions, description of string operations such as REP MOVSB, some code patterns for branchless conditions, a list of registers that should be saved in functions, and a lot of other useful stuff.

The idea is to put all reference information about x86 assembly language on the one page. Some rarely-used instructions such as LDS, BOUNDS or AAA are skipped.


The cheat sheet use common notation for operands: reg means register, [mem] means memory location, and imm is an immediate operand. Also, x, y, and z denote the first, the second, and the third operand. Instruction mnemonics are written in capital letters to make them easier to find when you are skipping through the cheat sheet.


A chunk of cheat sheet showing multiplication and division reference

For example, let's look at multiplication and division section. There are instructions for signed (IMUL) and unsigned (MUL) multiplication. Both instructions take one operand, which may be register (reg) or memory ([mem]). There are three possible cases:

  • If operand size is one byte, MUL or IMUL multiplies it by al and stores the result in ax
  • If operand size is a word, MUL or IMUL multiplies it by ax and stores the high-order word of the result in dx and the low-order word in ax.
  • If operand size is a double word, MUL or IMUL multiplies it by eax and stores the high-order dword in edx and the low-order dword in eax.

There are also two-operand and three-operand forms of IMUL shown on the figure above.

Other features of assembly language are described in a similar way.


The cheat sheet is designed for A4 page size; if you print it on US Letter paper, you will get large margins. You can print the cheat sheet and put it on your table to look for some instructions when you forget them.

Download Win32 Assembly Cheat Sheet (PNG picture, 713 Kb)

Serbo-Croatian translation of this article by WHG Team.

Peter Kankowski
Peter Kankowski

About the author

Peter is the developer of Aba Search and Replace, a tool for replacing text in multiple files. He likes to program in C with a bit of C++, also in x86 assembly language, Python, and PHP.

Created by Peter Kankowski
Last changed


Like it! Although i'm more of an OOP programmer (VB.net)
Really great work, only on one sheet, thank you !
Nice work!
And the FPU instructions? When will be added?
Peter Kankowski,
I plan to make another page for FPU and SSE instructions, just because there is no space for them on the current cheat sheet. If there will be two pages, you would print general-purpose instructions on one side of the A4 paper, and FPU/SSE instructions on the other side. But I still can't tell you when it will be finished, because I'm very busy now, sorry.
Hi, I really like your sheet and helps me alot, I think you forgot LODS* from 'String Operations' :)

Drop me an email if you decide to add it, gives the sheet more 'complete'-look :D
Peter Kankowski,
LODS is rarely used today, and it makes no sense with REP prefixes. LODS is also suboptimal and should be replaced with several simple instructions. You shouldn't use it in modern programs. That's why I decided to skip it.

Note that some other instructions are not included: LOOP, JECXZ, XLAT, BOUNDS, PUSHA/POPA, LAHF, SAHF, bit operations (BT, BTS, BTR, etc.), decimal and ASCII operations (AAA, DAA, etc.), and segment registers loading (LDS, LES, etc.).

I think it's better to include more information about modern features (say, CPUID flags) than to talk about obsolete instructions such as LODS or XLAT.

Anyway, it's always a compromise, because you can't put all information about x86 architecture on one A4 paper sheet. You have to skip something.
Oh, didnt know it wasnt used nowadays anymore :D
I learned to use it from old tutorial.
Anyway, are you going to make it double-paged, maybe with more hints how to use instructions?

(I like it how it is now, but having stuff on otherside of the paper is always a plus)

Link is to Cheat Sheet is not working, I was going to download and print it to my friend, but no matter what I tried, it always redirected me to that the very same post.
Peter Kankowski,
Oh, yes, sorry. It should work now.
Peter Kankowski,
I found two similar papers:
* Intel Assembler x86 CodeTable lists popular x86 instructions on two pages. It also includes a diagram of the registers and a simple 16-bit program.
* New complete x86 and x87 reference consists of a large table with opcode, description, and modified flags for each instruction. It is intended for both on-screen viewing and printing.
I've just entered this new world and I found everything fantastic!
Peter Kankowski,
Thank you for kind words, Victor, and - welcome to SmallCode. If you will have any questions, comments, or suggestions, please don't hesitate to post them.
A OOP VB programmer? Wow, I wouldn't tell anyone that!
static_cast(double_var); « blog,
[...] A subtração de valores 64 bits eu tirei daqui: http://smallcode.weblogs.us/2006/05/09/win32-assembly-cheat-sheet/ */ sub eax, dword ptr [ebp-8]; sbb edx, dword ptr [...]
excellent cheat sheet. thank you very much!
Hello. All is A4 format:

x86 registers:

x86 instructions:

Peter Kankowski,
Thank you! I cannot read Slovak, but your charts seem to be good for learning assembly language.

Hi, I'd like to learn "assembly"at home.

I can program in java but I don't know anything about "assembly". I say ANYTHING.

Where do I start?

Peter Kankowski,
Please start by googling for "assembly tutorial" (try also in your native language). Paul Carter's tutorial looks good at the first glance. You can also download FASM and read its docs.

Thank You Mr Peter.

It helped me a lot.

Mater Liu,

great Peter, thank you.




Thank you, by this very helpful site :)

Kind regards,


(from Portugal)
<p>thank you</p>

student: example count cube in assembler tasm x86


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